Fix: Support HTTP requests for FilteredPools

[mattverse]

cref: https://github.com/googleapis/googleapis/blob/master/google/api/http.proto

Current FilteredPools does not support http requests, as grpc gateway cannot do GET requests for non primitive types that are repeated.

This PR brings the solution using coins string, and then parsing the coins string manually with in the grp_query.go logic.

Brief Changelog

• Change FilteredPools MinLiquidity field from sdk.Coins struct to string

Testing and Verifying

Passes existing test on the grpc method, also added new test cases for the helper method.

Documentation and Release Note

• Does this pull request introduce a new feature or user-facing behavior changes? yes
• Is a relevant changelog entry added to the Unreleased section in CHANGELOG.md? yes
• How is the feature or change documented? (not applicable / specification (x/<module>/spec/) / Osmosis docs repo / not documented)

[nicolaslara]

does it make more sense to do:

			min_liquidity := args[0]
			var pool_type string
			if len(args) > 1 {
				pool_type = args[1]
			}

[mattverse]

Done! Nice catch!

[jonator]

Do you have an example of how the query should be serialized?

[mattverse]

@jonator are you asking for what an example request would look like? If so, it would look something like this

{
"min_liquidity": "100uosmo, 300uatom",
"pool_type": "Balancer"
}

[ValarDragon]

LGTM but needs API break changelog update

[ValarDragon]

Changed labels, this is query breaking, but state compatible, as its not a query exposed to state machine. (If it was we couldn't backport)

[jonator]

@jonator are you asking for what an example request would look like? If so, it would look something like this

{
"min_liquidity": "100uosmo, 300uatom",
"pool_type": "Balancer"
}

No I meant something like:
https://lcd-osmosis.keplr.app/osmosis/gamm/v1beta1/filtered_pools?pagination.limit=100&pooltype=stableswap

We can't send a body in a GET request

[github-actions]

This pull request has been automatically marked as stale because it has not had any recent activity. It will be closed if no further activity occurs. Thank you!

[mattverse]

@jonator Ah I see, it could be done using something like https://lcd-osmosis.keplr.app/osmosis/gamm/v1beta1/filtered_pools?pagination.limit=100&min_liquidity=100uosmo&pool_type=Balancer